Paper hood cap and the production thereof



April 16, 1929. w wRlGHT 1,709,511

PAPER HOOD CAP AND THE PRODUCTION THEREOF Filed Sept. 2, 1927 Patented Apr. 16,1929.

UNITED STATES PATENT OFFICE.

WILBUR L. WRIGHT, OF FULTON, NEW YORK, ASSIGNOR TO OSWEGO FALLS CORPORA- 'lION, OI FULTON, NEW YORK, A- CORPORATION OF N EW YORK. I

PAPER HOOD CAP AND THE PRODUCTION THEREOF.

Application filed September 2, 1927. Serial No. 217,191.

This invention relates to paper material hood caps particularly intended for exteriorly covering or capping the heads'of milk bottles and other containers that are formed with exterior rims or enlargements surrounding the container mouths; and the obj ects and nature of the invention will be readily understood by those. skilled in the art in the light of the following description of the accompanying drawings that illustrate what I now believe to be the preferred mechanical expressions or embodiments of the invention from among other forms and features within the sprit and scope ofthe invention.

The particular object of this invention is to provide an annularly skirted hood cap formed of sheet paper and shaped by any suitable means or by any suitable method to provide the annular skirt with longitudinal folds or creases through which the surplus paper material is taken up in the formatlon of the depending skirt, whereby the skirt can be contracted in diameter to rovide a lower securing portion with the fo ds closed together or contracted, and whereby the skirt, particularly the lower portion thereof can be increased in diameter by the cxpansion of the folds, and to provide as a part of this cap an elastic binder of a more or less permanent nature that constantly tends to maintain the skirt with its lower end portion contracted and at the same timeto permit expansion of the skirt when the neothe hood cap and container surface and that can be stripped from the container surface.

I attain this object, by-providing this sheet paper material hood cap with an elastic rubber or rubber material binder deposited on and adhering to the surface or surfaces of the cap skirt usually in the form of a thin film or films or layer or layers constantly tending to holdthe lower end of the skirt contracted to securin form, or this binder can'be in the form 0 elastic rubber layers formed on the skirt and elastically uniting the walls of the skirt folds to constantly tend to hold the walls together and consequently the lower end of the skirt in contracted form, and by employing such deposited or elastic material that cures or drys with a non-tacky exposed the cap skirt, and hence by reason of the elasticity or rubber like quality of the soft rubber binder, this cap by rocking movement can be I snapped on to the head of a, bottle or other container, and by like movement-in the opposite direction can be rocked upwardly and slipped from the head of the bottle or the container, and whereby this push-on cap can also be made a secured tight seal cap by rendermg the elastic medium tacky to tightly adhere to the container surface.

Referring to the accompanying drawings forming a part hereof:

F 1g. 1 shows in side elevation a flaring skirt paper material hood cap in its original form, the st1ppled surface indicating the elastic adherl'ng binder on either the inner or the outer zuilflace of the creased or pleated skirt or on o i ig. 2 shows in side elevation the hood cap in its final or completed form with the elashe or soft rubber binder applied thereto and yieldlngly holding the lower or securing portion of the skirt contracted.

Fig. 3 is a side elevation showing a portion of a bottle and the paper material hood cap in the act of being expanded by pressingand rocking onto the bottle head or therefrom.

Fig. 4-is a sectional view of a bottle head closed. by the ordinary inner paper disk, andcovercd by the hood cap of my invention. either the sealed cap.

Fig. 5 shows in elevation a flaring skirt flexible sheet paper hood cap, such as shown by Fig. 1, with the exception that the skirt, s rendered expansible by longitudinal slits with the securing portion of itsslitted skirt push-on'cap or the pushed-on and yieldingly held in contracted form by the norsuch as a (glass milk bottle, having an internal seat a apted to be closed by the ordinary paper disk a, as will be well understood by those skilled in the art. The head of. this bottle is formed with an upwardly and downwardly curving or rounding exterior annular rim 2 that provides a downwardly facing shoulder.

The paper hood cap is formed by dies or is-otherwise pressed up from flat sheet paper to form the flat imperforate central top wall 5 and the annular de ending skirt ,6 and this skirt is formed in t e operation of producing the cap, into a multiplicity of vertical or longitudinal folds, tucks or pleats' 7 .of any suitable or desirable formin cross section, and/or longitudinal slits 7 to form tongues, referably so that the pleats or folds can e more or less tightly closed together and if need be overlapped in fiat form annularly around the skirt, when the skirt is in-its contracted form. When the skirt is expanded to slip onto or from the bottle head these folds or pleats expand or the tongues spread.

To normally and yieldingly maintain, particularly the lower or securing end of, the skirt in contracted form tightly hu ging the downwardl facing shoulder or un erside of the bottle head rim, I'provide the elastic binder 8, consisting of an adhering surface film or films or layer or layers of elastic rubber of rubber like binder formed on and carried by the cap skirt. This elastic binder constantly tends to yieldingly hold the skirt folds or pleats in collapsed condition or the tongues overlapping and the annular securing ortion or end of the skirt in contracted hood cap securing form. This rubber binder is of'such elastic quality as to permit the skirt to radially expand under tension so that when released the skirt will snap back or spring back, under the tension of the elast1c binder to securing condition.

\ This binder is formed on and adheres to the paper skirt, substantially as a permanent part thereof, by applying to the skirt a li uid composition consisting of any suitab e solution of rubber or latex, anysuitable filler or fillers, and a suitable solvent such asammonia, or the like. Such emulsified latex or sol ions are well known and familiar to ing of the deposit of latex and other solid ingredients as a dry watei'proof non-tacky film on and closel adhering to the paper and possessing the ru ber like quality .of elasticity, of stretching under tension, with a constant tendency to return to its original form. The emulsified rubber or solution can be applied to the entire inner and outer surfaces of the sheet paper cap or to either the inner or outer surface thereof, or to either the inner gr (uter orboth surfaces of the skirt ailone,

y i pin spra in or otherwise a in the rl ibber barryi iw liquid. The rubb y a rying liquid is app ied, preferably, while the lower or securing end of the skirt of the cap is held in contracted form and the cap skirt is preferabl thus held in contracted form until the ru ber cures to form the soft permanent elastic film.

On the other hand the cap skirt mi ht be coated with the rubber carrying so ution while the skirt is in flaring form and then the skirt can be brought. to contracted form, to cap securing form, while the rubber is still tacky and uncured, sothat the rubber- If desired sulphur or other vulcanizing" agents and any well known vulcanizing accelerator can be included in the rubber emulsion or solution if it is desired to vulcanize the rubber film carried by the cap skirt, at the factory, before the caps are shipped to the user.

' Also instead of natural latex I can employ rubber substitutes or synthetic rubber 'wherever found desirable or suitable for my purposes.

.Where the rubber film or layers are formed on the inner surface of the cap skirt it will be found that the rubber forms an approximately ti ht seal in contact with the glass surface 0 the bottle hood cap, and yet such rubber can be stripped from the glass surface as the hood ca is removed, without leavin objectionable e osits.

he thickness of the rubber deposit or film on the hood ca skirt while usually but a few thousandths of an inch in thickness can be controlled by the viscosity of the rubber emul-' sion or solution or b the number of clippings or applications of the solution to the paper. The thickness of the rubber deposit. on the paper can be varied to suit conditions and-the strength of the rubber deposit requiredfor varying capping conditions.

highly desirable push-on cap. These caps can be supplied to the market, in nested form if so desired, and can be readily separated from the nest and pushed or snapped onto bottle heads by hand or by machinery. These caps can be nested because'ofthe elastic expansible characteristics of their skirts, and when separated from the nest, the skirt of each cap will contract to its normal form.

The cam-like or rounded surfaces of the bottle rims, facilitate the expansion of the skirts as the caps are rocked onto and rocked from the bottle heads or mouths.

-The elastic lower or securing ends of the skirts will tightly grasp the bottle heads at the under surfaces of the rims of the heads and will thusretain the caps on the bottle heads during handling.

It is within the scope of this invention to provide flaring skirt flexible sheet paper caps, I

having the non-tacky elastic rubber binder deposits thereon, the rubber preferably not being vulcanized to such an extent as to prevent the binder surface from being rendered tacky at the hood capping situation. I These flaring skirt caps can then be shipped to the bottlers who can center the flaring caps on .the bottle heads by machinery, and then by machinery through the use of suitable clamping or contracting heads, these flaring skirts can be contracted to securing position under the bottle head rims and then by said heads subjected to a temperature that Will render the binder surface tacky, particularly where the binder is made up from reclaimed rub- I particularly desire to protect that feature of my invention involving the sealing of the hood cap skirt to and annularly around the exterior of the container, preferabl below the rim or exterior of the container ead, by the use of a rubber or an elastic rubber like film or layer or layers on the inner surface of the hood cap skirt, possessing the characteristics "of adhering closely to both the paper surfaces of the hood cap and to the glass or paper surfaces of the container to form an approximately liquid and air tight seal, and of stripping from the container surfaces without leaving thereon seriously ObJGCtlOIlable deposits, when the hood cap is stripped or removed from the container head.

It is within my invention to render the depending annular skirt of the paper hood cap,

before it receives the elastic rubber or rubber like film or layer or layers, expansible and contractile by pleats or folds as hereinbefore described, and/or by forming longitudinal slits in the skirt to provide the skirt with depending tongues which will overlap each other to a greater or less extent when'the skirt is molded to thebottle neck under the bottle rim. The rubber-like film or layer will cause these overlapping tongues to adhere together and the webs, layers or films of rubber connecting such tongues of the slitted skirt will elastically stretch to permit expansion of the skirt and to return the skirt to and yieldingly maintain the same in contracted condition. y

The feature of my invention particularly emphasized herein, is the capacity of the push on elastic skirt hood cap, herein described, to perform, if so desired, the added functions of a'bottle sealing cap i. e. to be tightly sealed layers or a film or films of substantially nontacky elastic rubber exposed at the inner surface or surfaces of its expansible skirt and holding that skirt yieldingly contracted to securing condition, can'also serve the purpose of a securing sealing cap by treating the rubber or rubber-like material on its skirt to soften the surface thereof and render the same tacky at the hood capping situation so that the skirt 011 being molded, pressed or wiped to tight (preferably air excluding) contact with the exterior surfaces of the bottle head, will closely adhere thereto and seal against the same, with the capacity of strip ping from said surfaces when the cap is removed.

It is also within the scope of my invention, to provide hood-cap-forming flexible paper disks having'the non-tacky elastic rubber or rubber-like films on the inner surfaces thereof, or flaring skirt paper hood caps having such films or layers on the interior surfaces thereof, and to thus supply such disks or caps to the bottlers. The bottlers at the hood capping situation, will b suitable treatment render the surfaces of t e rubber films soft and tacky and then by suitable machinery form the disks into hood caps on and molded and adhering to the bottle heads or mold and compress the cap skirts to the bottle heads to adhere and seal thereto.

The rubber films can be rendered soft by application of heat to the disk or cap while on llb the bottle head, through the medium or rings or the molding or compressing heads that mold and compress the disk or cap on the bottlehead, the disk or cap just before applica tion can be passed through a hot chamber, or a steam chamber to render the rubber surface tacky, or the rubber surface can be rendered tacky by fumes of a rubber solvent, or by spraying with a rubber solvent, such as ammonia or the like.

The rubber film or layer can be cured or dried on the cap or disk, after application of the rubber liquid by spraying, immersing, or otherwise.

The following is an example fromamong other various rubber or rubber-like solutions, that might be employed for my purposes, namely About pounds reclaimed rubber.

About 5 gallons gasoline.

About 10 gallons benzol with or without.

About 25 pounds CaCO precip. (calcium carbonate).

This case is in part a continuation of my application filed August 20, 1927, Serial No. 215,011, for hood caps, for milk bottles and like containers.

What I claim is:

1. In the method of producing binder carrying flexible sheet paper material hood caps, those steps which comprise depositing a rubber emulsion or solution on the annular radially expansible hood ca skirt and permitting the same to cure to orm an elastic permanent adhering binder.

2. In the method of producing a paper material hood cap having an annular skirt rendered expansible and contractile by longitudinal folds or pleats or tongues, that step which consists in providing the skirt with an annular elastic adhering binder by depositing thereon rubber or its equivalent in the form of solution or emulsion.

3. A hood cap for container heads comprising sheet paper wherein the annular skirt of the cap is formed with longitudinal folds or pleats or tongues to render the cap expansible,

i the skirt of said cap being provided with a permanent elastic binder consisting of a deposit or deposits of rubber or its equivalent cured or dried on and adhering to the paper material surface and. capable of stripping from glass surfaces.

4. A paper material hood cap having a normally contracted elastic expansible annular skirt provided with and carrying a normally non-tacky elastic rubber-like binder capable of being rendered tacky at the hood capping p situation said binder being in dried film-like form permanently adhering to the paper material surface.

5. A flexible paper material hood cap having a radially expansible annular skirt the lower or securing portion of which is yieldingly maintained in securing form and provide 7 A flexible sheet paper hood cap disk having its skirt provided with, a binder'of elastic rubber or rubber-like material deposited and dried on the paper surface and permanently adhering thereto and capable of being rendered tacky or adhering to and stripping from the container surface.

8. The method of applying flexible sheet paper hood caps having the container contacting surfaces of their skirt portions carrying a non-tack Y elastic rubber-like binder deposited an cured on the paper surface and adhering thereto, those steps which consist in rendering such binder tacky by subjecting the same to heat or a solvent, at the container hood capping situation, and before or after the hood cap has been placed on the container head, and molding or contracting the hood cap skirt around the bottle head with its tacky binder in close adhering sealing contact with and around the container surface.

9. A sheet paper material ush-on hood cap for covering container hea s, having a normally contracted elastic expansible annular skirt provided with a binder normally maintaining the skirt in contracted form and rendering the skirt expansible, said binder embodying an adhering elastic deposit of rubher like material dried thereon.

10, A hood cap for container heads, embodying flexible sheet fibrous material having the surplus material in its annular skirt ta en up by longitudinal folds, said skirt having an elastic binder deposit dried thereon and adhering thereto and normally holding the securing portion of the skirt in 'contracted form and rendering such skirt expansible for pushin onto a container head, said bind tained in contracted securing form by and rovided with an elastic deposit dried. thereon to substantially non-tacky condition and embodyinc rubber latex.

12. sheet fibrous material hood cap for container heads having its annular skirt longitudinally creased to render the saine radially contractile and expansible, said skirt d having a dried adhering deposit of rubber latex entering into said creases and rendering 13. A paper hood cap disk, theannular.

skirtportion of which carries at its bottle contacting inner surface at least an approximately non-tacky rubber like elastic binder adhering to the paper, and capable of being rendered tacky for sealing said skirt portion to the bottle contacting surface for stripping therefrom to remove the cap.

14. A sheet paper hood cap having its anf nular' skirt formed with longitudinal folds to take up the surplus material and render the skirt radially expansible and contractile, said skirt provided around the circle thereof withan elastic binder that embodies deposits of elastic rubber like material within said folds and adhering to the adjacent side walls thereof.

In testimony whereof I have hereunto set my hand at Fulton, New York, this 30th day of August, 1927.

- WILBUR L. WRIGHT. 

